SpacemiT K3: Update OpenSBI / U-Boot to k3-br-v1.0.8

[pyavitz]

This picks up from the following PR; #10506

Additions:

• Update to k3-br-v1.0.8
• Add erasespi function run erasespi (Forces unit into fastboot mode upon reset)
• Force MII PHY network layers to initialize early to prevent an EFI access fault crash and remove dhcp run.

Summary by CodeRabbit

• New Features

  • Updated SpacemiT K3 boot support to the newer v1.0.8 firmware release.
  • Added distro-style boot discovery across USB, SD card, NVMe, SCSI, and MMC storage.
  • Added PXE network boot support and improved EFI network initialization.
  • Added SPI flash boot handling with super-speed transfer support.

• Bug Fixes

  • Resolved a Linux reserved-memory overlap warning during boot.
  • Reduced bootloader output noise and removed faulty print timestamps.
  • Adjusted firmware contents to remain within BootROM download limits.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Advanced

Run ID: 2ddebc77-2201-4386-a5b4-e9bcdd2f1bb0

📥 Commits

Reviewing files that changed from the base of the PR and between bc5e3a7 and 11483b0.

📒 Files selected for processing (10)

• config/sources/families/spacemit-k3.conf
• packages/blobs/riscv64/spacemit-k3/esos.itb
• packages/blobs/riscv64/spacemit-k3/spi-flash-howto.txt
• patch/atf/atf-spacemit-k3/001-k3-fix-rcpu1-reserved-mem-overlap.patch
• patch/u-boot/legacy/u-boot-spacemit-k3/001-SpacemiT-K3-fixup-boot-variables.patch
• patch/u-boot/legacy/u-boot-spacemit-k3/002-Update-SpacemiT-K3-defconfig.patch
• patch/u-boot/legacy/u-boot-spacemit-k3/003-Update-SpacemiT-K3-Env.patch
• patch/u-boot/legacy/u-boot-spacemit-k3/004-board-spacemit-k3-Initialize-miiphy-early-to-fix-EFI.patch
• patch/u-boot/legacy/u-boot-spacemit-k3/005-lib-printf-Revert-spacemit-s-buggy-CONFIG_PRINT_TIME.patch
• patch/u-boot/legacy/u-boot-spacemit-k3/006-Fixup-circular-deps.patch

Included review availability: Your plan provides up to 8 included reviews per hour; 7 remain after this review.

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📝 Walkthrough

Walkthrough

The SpacemiT K3 update selects k3-br-v1.0.8, adjusts OpenSBI memory sizing, revises U-Boot configuration and boot environments, initializes networking earlier, removes printf timestamps, and updates SPI flash staging instructions.

Changes

SpacemiT K3 boot stack

Layer / File(s)	Summary
Source tag and OpenSBI memory fix config/sources/families/spacemit-k3.conf, patch/atf/atf-spacemit-k3/001-k3-fix-rcpu1-reserved-mem-overlap.patch	The K3 source tag changes to k3-br-v1.0.8. RCPU1_RUNTIME_SPACE_SIZE changes from 0x400000UL to 0x200000UL.
U-Boot configuration update patch/u-boot/legacy/u-boot-spacemit-k3/002-Update-SpacemiT-K3-defconfig.patch	The defconfig changes SPL contents, boot-standard settings, command selection, logging, image support, and console buffer sizes.
U-Boot boot environment and device flow patch/u-boot/legacy/u-boot-spacemit-k3/001-SpacemiT-K3-fixup-boot-variables.patch, patch/u-boot/legacy/u-boot-spacemit-k3/003-Update-SpacemiT-K3-Env.patch	Boot variables use distro boot names. The environment adds PXE booting and SPI erase support, enumerates PCIe before NVMe scanning, and updates image defaults and autoboot behavior.
Board initialization and printf behavior patch/u-boot/legacy/u-boot-spacemit-k3/004-board-spacemit-k3-Initialize-miiphy-early-to-fix-EFI.patch, patch/u-boot/legacy/u-boot-spacemit-k3/005-lib-printf-Revert-spacemit-s-buggy-CONFIG_PRINT_TIME.patch	Non-SPL network builds initialize the MII PHY in board_init(). U-Boot printf no longer prepends timestamp data.
SPI flash staging procedure packages/blobs/riscv64/spacemit-k3/spi-flash-howto.txt	The instructions wait 10 seconds and enable fastboot super-speed between FSBL and U-Boot staging.

Priority: ⬇️ Low

Estimated code review effort: 3 (Moderate) | ~25 minutes

Change: Feature

Sequence Diagram(s)

sequenceDiagram
  participant UBoot
  participant PCIeRootPort
  participant NVMeDevice
  participant PXEServer
  UBoot->>PCIeRootPort: pci enum
  PCIeRootPort->>NVMeDevice: enumerate device
  UBoot->>NVMeDevice: nvme scan
  UBoot->>PXEServer: dhcp and pxe get
  PXEServer-->>UBoot: PXE boot data

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Merge Risk: ⚪ Minimal · up to 11483

The revised K3 boot environment retains support for extlinux boot configurations. No merge-blocking risk remains.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely identifies the SpacemiT K3 target and the primary OpenSBI and U-Boot update to k3-br-v1.0.8.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create a new PR

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[EvilOlaf]

looks sane

[github-actions]

✅ This PR has been reviewed and approved — all set for merge!